well, of the 3 I've bought,
1 had a movement that has so far kept great time and been relatively bulletproof.
1 was missing movement spacer.
2 had dials glued down.
2 had hands in terrible condition.
2 were missing dial spacers.
2 movements had broken jewels.
2 had individual parts that didn't match the movement (7019 mainplate in a 7009, and 6319 barrel bridge in a 6309).
All 3 had badly glued in, ill-fitting crystals.
All 3 were not water resistant, to the point they would condense in the slightest humidity.
All 3 had movements, dials, cases that were mismatched.
All 3 had decent balances.
I'd say it's a complete crapshoot, but you're not getting anything great.
It's probably better to buy a job lot of 7009a movements and a nice aftermarket case and bracelet, spacers, and gaskets.